Allow run_binary to have executable's execute tools

[finn-ball]

Currently if a binary foo internally executes binary bar, then bar's runfiles tree may not be populated as bar can only be added as an input and not as part of the tools.

    ctx.actions.run(
        outputs = ctx.outputs.outs,
        inputs = ctx.files.srcs,
        tools = [ctx.executable.tool],
        executable = ctx.executable.tool,
        arguments = args,
        mnemonic = "RunBinary",
        use_default_shell_env = False,
        env = dicts.add(ctx.configuration.default_shell_env, envs),
    )

https://github.com/bazelbuild/bazel-skylib/blob/471f368fc95a7323078f69d569a164ee5bc07f8b/rules/run_binary.bzl#L44C1-L53C6

Instead to ensure it is, it could be better to have:

        tools = ctx.executable.tools,
        executable = ctx.executable.executable,

This would require a minor change in the attributes in that tool now becomes a list.